| 摘要 |
PURPOSE:To automatically vary the distortion correcting quantity of a horizontal deflecting current flowing to a horizontal deflecting coil by comparing and detecting a fluctuation of a chopper power source output voltage and a fluctuation of a secondary side voltage of a power source transformer by utilizing a computing element, and superposing an output voltage corresponding to its load fluctuation and a correction use parabolic voltage. CONSTITUTION:A secondary side output of a power source transformer T1 is rectified by a diode D4 and a capacitor C2, supplied as a supply power source of a deflection system and a video system, and a voltage fluctuation of a rectifying output is transferred to an operational amplifier OP1. When a video signal of >=30% duty is supplied, the secondary side voltage of the power source transformer T1 drops, and a DC output voltage is generated in an output of the operational amplifier OP1. As a result, a parabolic voltage to which a DC voltage is superposed is obtained in an output terminal of an operational amplifier OP2. In such a way, in order to adjust the horizontal amplitude corresponding to a load fluctuation, an image stabilization being suitable for a display monitor having many load fluctuation factors can be realized. |
